body {
    margin: 0;
    padding: 0;
    font-size: 14px;
}

.el-main {
    margin: 0;
    padding: 0;
}

/* backstage --- 类型的按钮样式 */
.el-button--backstage {
    background-color: #0B70C0;
    color: #ffffff;
    border: none;
    border-radius: 5px;
    font-size: 16px;
    cursor: pointer;
}

.el-button--backstage:hover {
    background-color: #0B70C0;
}